-68.52% is the change from 972 to 306
Calculation steps:
[( 306 - 972 ) ÷ 972] x 100 = -68.52%
Formula
Percentage change = [(306 - 972) / 972] x 100
Subtract the new number by the original number
306 - 972 = -666
-666 ÷ 972 = -0.6851851851851852
-0.6851851851851852 x 100 = -68.52%